Download - Day Measuring Segments and Angles
Warm-Up 2/4/20131. Name the Intersection of Plane AED and HEG.2. Name the fourth point in the
plane BCH.3. Use always, sometimes, or never
to made a true statement: a) Three points are ? Coplanar.b) Two lines ? Meet in more than
one point.
Measuring Segments and Angles
Find KNEX:
7 13KN = distance between K and N or the length
of KN
= the name of the segment between K and N
Find a length or distance on a number line =
K N
Segment Addition Postulate: If A, B, and C are collinear and B is between A and C
Then AB + BC = AC
A
CB
1-4 Measuring Angles
Angle: is formed by two rays with the same endpoint.
The rays are the SIDES of the angle. The endpoint is the VERTEX of the angle.
EX NAMES: <ABC<CBA<1
Adjacent Angles
Angles that are beside each other and share a common ray as one of their sides.
______ and _______ are adjacent angles.
Linear PairAre adjacent angles whose non-
common sides are opposite rays.
Opposite Rays:A Linear Pair is:
Angle BisectorIs a ray that divides an angle into two
angles.
____ bisects _______, therefore_____________